In 2014, Little League District Administrators initially voted to move the age determination date from April 30 to December 31, effective with the 2018 season. That was amended by District Administrators and the Little League International Board of Directors in August 2015, moving the date from December 31 to August 31.

For players born on or before August 31, 2005:

The new age determination date of August 31 will be effective starting with the 2018 Little League Baseball Season. For the 2016 and 2017 seasons, these players will use the April 30 age determination date.

For players born on or after September 1, 2005:

The new age determination date will be effective immediately, starting with the 2016 season. This was the implementation used for the 2015 season, with players turning 4 to 9 years old during the 2015 calendar year to use the December 31 age determination date. That implementation remains in place, except instead of using December 31, you will use August 31.